Lactose Is a Disaccharide of Glucose and Galactose, and Its

Lactose is a disaccharide of glucose and galactose, and its digestion requires the actions of the enzyme lactase. If lactose is eaten as part of the diet but is not digested by lactase, this sugar is then metabolized by bacteria in the intestine, leading to the symptoms of lactose intolerance. Lactose intolerance, therefore, results from a(n) :

A) lack of hydrolysis of lactose.
B) lack of dehydration synthesis of lactose.
C) low blood lactose level.
D) inability of the body to produce lactose.